Compressor and Exhaust Structure Thereof

ABSTRACT

Disclosed are a compressor and exhaust structure thereof. The exhaust structure includes a cylinder, an upper flange and a lower flange respectively provided on an upper side and a lower side of the cylinder, and a main shaft having a sliding vane mounting portion. The sliding vane mounting portion of the main shaft is provided with at least two sliding vanes. A rotary plate is provided between the sliding vane mounting portion and at least one of the upper flange and the lower flange; the rotary plate is fixedly connected with the main shaft, and provided with exhaust openings and exhaust valves configured to control opening/closing of respective exhaust openings. The exhaust structure of the compressor is capable of avoiding a problem that a valve plate is prone to fatigue damages, while also increasing the operating frequency and a maximum refrigerating capacity of the compressor.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a national phase application of InternationalApplication No. PCT/CN2017/103889, filed on Sep. 28, 2017, which claimsthe priority of Chinese Patent Application No. 201610905871.7, filed onOct. 17, 2016, and entitled “Compressor and Exhaust Structure Thereof”,the disclosure of which is incorporated herein by reference in itsentirety.

TECHNICAL FIELD

The present invention relates to the technical field of compression, andmore particularly, to a compressor and an exhaust structure thereof.

BACKGROUND

A rotary vane compressor in the prior art generally exhausts at the sideof the cylinder or at the side of the flange, that is, an exhaustopening and an exhaust valve plate are arranged in the cylinder or inthe flange, and the position of the exhaust opening is fixed.

The main shaft of the rotary vane compressor is provided with aplurality of sliding vanes, each of which is corresponding to one ofcompression cavities, the exhaust end of each compression cavity canperiodically align with the exhaust opening while the main shaftrotating, to complete the gas discharging.

However, the exhaust opening in the prior art may be opened or closedseveral times in one rotation circle, and the frequent opening andclosing may easily cause a problem of fatigue or even fracture of thevalve plate which controls the opening and closing of the exhaustopening.

Therefore, it has become an important technical problem to be solved bythose skilled in the art that the valve plate of the compressor in theprior art is prone to fatigue damages.

SUMMARY

In view of this, an objective of the present application is to providean exhaust structure of a compressor, which can avoid the problem thatthe valve plate is prone to fatigue damages, and moreover, which canincrease the operating frequency of the compressor and the maximumrefrigerating capacity of the compressor. Another objective of thepresent application is to provide a compressor having the exhauststructure mentioned above.

The present application provides an exhaust structure of a compressor,including a cylinder, an upper flange and a lower flange which aredisposed on an upper side and on a lower side of the cylinderrespectively, and a main shaft having a sliding vane mounting portion;wherein, the sliding vane mounting portion of the main shaft is providedwith at least two sliding vanes; a side of each sliding vane is a gassuction side, and another side of the sliding vane is an exhaust side; arotary plate is provided between the sliding vane mounting portion andat least one of the upper flange and the lower flange; the rotary plateis fixedly connected with the main shaft; and the rotary plate isprovided with exhaust openings which communicate one-to-one with theexhaust side of each of the sliding vanes, and each exhaust opening isprovided with an exhaust valve which controls opening and closing of theexhaust opening.

In an embodiment, the sliding vane mounting portion is provided with avent, which is configured to increase an area of communication betweenthe exhaust side of the sliding vane and the exhaust opening of therotary plate.

In an embodiment, there is only one rotary plate, which is providedbetween the upper flange and the sliding vane mounting portion; andexhaust passages are disposed in the upper flange corresponding torespective exhaust openings of the rotary plate.

In an embodiment, there is only one rotary plate, which is providedbetween the lower flange and the sliding vane mounting portion; andexhaust passages are disposed in the lower flange corresponding torespective exhaust openings of the rotary plate.

In an embodiment, there are two rotary plates; one rotary plate isprovided between the upper flange and the sliding vane mounting portion;another rotary plate is provided between the lower flange and thesliding vane mounting portion; and the upper flange and the lower flangeare both provided with exhaust passages corresponding to respectiveexhaust openings of each rotary plate.

In an embodiment, a connecting opening is disposed on the rotary plateat a position corresponding to the sliding vane mounting portion; andthe rotary plate is fixed on the sliding vane mounting portion through aconnecting member which is inserted and mounted in the connectingopening.

In an embodiment, a sum of cross-sectional areas of all exhaust passagesis greater than a sum of cross-sectional areas of all exhaust openings.

In an embodiment, the vent is a chamfered structure, which is disposedat an edge of the sliding vane mounting portion and adjacent to theexhaust side of each sliding vane.

In an embodiment, a chamfered surface of the chamfered structure is acurved surface.

The present application further provides a compressor having the exhauststructure mentioned above.

In the technical solutions provided by the present application, a rotaryplate is provided between the sliding vane mounting portion and theupper flange and/or the lower flange; the rotary plate rotates alongwith the main shaft; the rotary plate is provided with exhaust openingswhich communicate one-to-one with each of the sliding vanes; the exhaustopenings communicate one-to-one with the exhaust side of each slidingvane; an exhaust valve is configured to control opening and closing ofeach exhaust opening. When the compressor operates, and when thepressure of the refrigerant in the compression cavity reaches the setpressure, the exhaust valve corresponding to the compression cavityopens, and the high-pressure refrigerant is discharged through theexhaust opening. It should be noted that, when the compressor operates,the inner cavity of the cylinder is separated into a plurality ofcompression cavities and gas suction cavities by a plurality of slidingvanes; the exhaust side of each sliding vane refers to a side of thesliding vane which is located in the compression cavity, and the otherside which is located in the gas suction cavity is the gas suction side.In this way, when the main shaft rotates for one cycle, each compressioncavity fulfills one exhaust process, and each compression cavity iscorrespondingly provided with one exhaust opening and one exhaust valve,therefore, each exhaust valve only needs to open and close once when themain shaft rotates for one cycle, thereby avoiding the problem that theexhaust valve is prone to fatigue damages. Moreover, such an exhauststructure can increase the operating frequency of the compressoreffectively and increase the maximum refrigerating capacity of thecompressor.

DESCRIPTION OF THE DRAWINGS

In order to describe the embodiments of the present invention or thetechnical solutions in the prior art more clearly, the figures to beused in describing the embodiments or the prior art will be brieflydescribed. Obviously, the figures to be described below are merelyembodiments of the present invention. For those skilled in the art,other figures may be obtained according to these figures without anycreative work.

FIG. 1 is a schematic view of the main shaft in an embodiment of thepresent invention;

FIG. 2 is a schematic view of the rotary plate in an embodiment of thepresent invention;

FIG. 3 is a cross-sectional view of the compressor in the firstembodiment of the present invention;

FIG. 4 is an exploded view of the rotary plate and the main shaft in thefirst embodiment of the present invention;

FIG. 5 is a cross-sectional view of the compressor in the secondembodiment of the present invention.

in FIGS. 1-5:

-   -   cylinder—11, upper flange—12, lower flange—13, main shaft—14,    -   sliding vane mounting portion—15, rotary plate—16, exhaust        opening—17,    -   exhaust valve—18, vent—19, exhaust passage—20.

DETAILED DESCRIPTION OF EMBODIMENTS

An objective of the embodiments is to provide an exhaust structure of acompressor, which can avoid the problem that the valve plate is prone tofatigue damages, and moreover, which can increase the operatingfrequency of the compressor and the maximum refrigerating capacity ofthe compressor. Another objective of the embodiments is to provide acompressor having the exhaust structure mentioned above.

The embodiments will be described hereinafter with reference to theaccompanying figures. Furthermore, the embodiments described below arenot intended to limit the contents described in the claims. And thecontents described in the following embodiments are not all required forthe solutions described in the claims.

As shown in FIGS. 1 to 4, the exhaust structure of the compressorprovided by the embodiment includes a cylinder 11, an upper flange 12, alower flange 13, a main shaft 14 and a rotary plate 16.

Wherein, the main shaft 14 passes through the cylinder 11, and the upperside and lower side of the cylinder 11 are sealed by the upper flange 12and the lower flange 13 respectively. A sliding vane mounting portion 15of the main shaft 14 is disposed in the working cavity of the cylinder11. The sliding vane mounting portion 15 is provided with at least twosliding vanes, which separate the working cavity of the cylinder 11 intoa compression cavity and a gas suction cavity while the main shaft 14 isrotating. When the refrigerant in the compression cavity is compressedto arrive at a preset pressure, the refrigerant is discharged from thecylinder 11. When the gas refrigerant is discharged, a side of thesliding vane adjacent to the compression cavity is the exhaust side, andthe other side is the gas suction side.

In this embodiment, a rotary plate 16 is provided between the slidingvane mounting portion 15 and at least one of the upper flange 12 and thelower flange 13. For example, as shown in FIG. 3, a rotary plate 16 isprovided between the upper flange 12 and the sliding vane mountingportion 15. Or, as shown in FIG. 5, a rotary plate 16 is providedbetween the upper flange 12 and the sliding vane mounting portion 15,and another rotary plate 16 is provided between the lower flange 13 andthe sliding vane mounting portion 15. Alternatively, a rotary plate 16is only provided between the lower flange 13 and the sliding vanemounting portion 15.

The rotary plate 16 is fixedly connected with the main shaft 14, whichenables the rotary plate 16 to rotate synchronously with the main shaft14. In addition, in this embodiment, the rotary plate 16 is providedwith exhaust openings 17 which communicate one-to-one with the exhaustside of each sliding vane, and is provided with an exhaust valve 18which controls the opening and closing of the exhaust opening 17. Whenthe pressure of the compressed gas inside the compression cavity reachesthe preset pressure, the exhaust valve 18 opens, and the compressed gasis discharged through the exhaust opening 17.

For example, in this embodiment, the sliding vane mounting portion 15 isprovided with three sliding vanes; the rotary plate 16 iscorrespondingly provided with three exhausting openings 17; and thethree exhausting ports 17 communicate one-to-one with the exhaust sideof each of the three sliding vanes. Certainly, in other embodiments, thenumber of sliding vanes and exhausting ports 17 provided may be anynumber else.

When the compressor operates, and when the pressure of the refrigerantin the compression cavity reaches the set pressure, the exhaust valve 18corresponding to the compression cavity opens, and the high-pressurerefrigerant is discharged through the exhaust opening 17.

In this way, when the main shaft 14 rotates for one cycle, eachcompression cavity fulfills one exhaust process, and each compressioncavity is correspondingly provided with one exhaust opening 17 and oneexhaust valve 18, therefore, each exhaust valve 18 only needs to openand close once when the main shaft 14 rotates for one cycle, therebyavoiding the problem that the exhaust valve 18 is prone to fatiguedamages. Moreover, the time required for the exhaust valve to open andclose may be negligible, thereby increasing the operating frequency ofthe compressor effectively and increasing the maximum refrigeratingcapacity of the compressor.

In order to increase the exhaust area of the cylinder 11 and reduce theenergy loss caused by gas discharging, in the preferred solution of theembodiment, the sliding vane mounting portion 15 is provided with a vent19 which is configured to connect the exhaust side of the sliding vaneto the exhaust opening 17 of the rotary plate 16. In this way, the vent19 can assist in discharging gas, thereby increasing the exhaust area ofthe cylinder 11 and reducing the resistance for discharging gas.

In this embodiment, the rotary plate 16 is connected to the sliding vanemounting portion 15 through a connecting member such as a rivet, a pin,or a screw, etc. Specifically, a connecting opening is disposed on therotary plate 16 at a position corresponding to the sliding vane mountingportion 15, and the rotary plate 16 is fixed on the sliding vanemounting portion 15 through the connecting member such as the rivet, thepin, or the screw, etc., which is inserted and mounted in the connectingopening.

Alternatively, in this embodiment, the rotary plate 16 may be fixedlyconnected to the sliding vane mounting portion 15 by other means, suchas welding, casting connection and so on.

In this embodiment, the exhaust opening 17 in the rotary plate 16communicates with the outside through the exhaust passage 20 disposed inthe upper flange 12 or in the lower flange 13. Further, the sum of thecross-sectional areas of all exhaust passages 20 is larger than the sumof the cross-sectional areas of all exhaust openings 17, which canfurther reduce the resistance for discharging gas and the powerconsumption of the compressor.

In a preferred scheme of the present embodiment, specifically, the vent19 disposed on the sliding vane mounting portion 15 is a chamferedstructure, which is disposed at an edge of the sliding vane mountingportion 15 and adjacent to the exhaust side of each sliding vane.

When the vent 19 is processed, simply a processing tool is needed to cutoff a portion at the edge of the sliding vane mounting portion 15directly, to form the chamfered structure, which facilitates processing.In an embodiment, the chamfered surface of the chamfered structure is acurved surface. In this way, the side wall of the vent 19 is relativelyrounded and smooth so as to facilitate the gas circulation.

The embodiment also provides a compressor having an exhaust structurethat is described in the above embodiments. In this way, the compressorprovided in this embodiment can avoid the problem that the valve plateis prone to fatigue damages, and can increase the operating frequency ofthe compressor and the maximum refrigerating capacity of the compressor.The beneficial effects of the processor can be derived in a similar wayas the beneficial effects achieved by the exhaust structure mentionedabove, and therefore it will not be repeated herein.

The description of the embodiments disclosed above enables those skilledin the art to implement or use the present invention. Variousmodifications to these embodiments are readily apparent to those skilledin the art, and the general principles defined herein may be applied toother embodiments without departing from the spirits or the scope of theinvention. Thus, the present invention will not be limited to theembodiments illustrated herein, but conform to the widest scopeconsistent with the principles and novel features disclosed herein.

1. An exhaust structure of a compressor, comprising a cylinder, an upperflange and a lower flange which are disposed on an upper side and alower side of the cylinder respectively, and a main shaft having asliding vane mounting portion; wherein, the sliding vane mountingportion of the main shaft is provided with at least two sliding vanes; aside of each sliding vane is a gas suction side, and another side ofeach sliding vane is an exhaust side; characterized in that wherein, arotary plate is provided between the sliding vane mounting portion andat least one of the upper flange and the lower flange; the rotary plateis fixedly connected with the main shaft; and the rotary plate isprovided with exhaust openings which communicate one-to-one with theexhaust side of each of the sliding vanes, and is provided with anexhaust valve which controls opening and closing of the exhaust opening.2. The exhaust structure according to claim 1, wherein, the sliding vanemounting portion is provided with a vent, which is configured toincrease an area of communication between the exhaust side of thesliding vane and the exhaust opening of the rotary plate.
 3. The exhauststructure according to claim 1, wherein, there is only one rotary plate,which is provided between the upper flange and the sliding vane mountingportion; and exhaust passages are disposed in the upper flange andcorresponding to respective exhaust openings of the rotary plate.
 4. Theexhaust structure according to claim 1, wherein, there is only onerotary plate, which is provided between the lower flange and the slidingvane mounting portion; and exhaust passages are disposed in the lowerflange and corresponding to respective exhaust openings of the rotaryplate.
 5. The exhaust structure according to claim 1, wherein, there aretwo rotary plates; one rotary plate is provided between the upper flangeand the sliding vane mounting portion; another rotary plate is providedbetween the lower flange and the sliding vane mounting portion; and theupper flange and the lower flange are both provided with exhaustpassages corresponding to respective exhaust openings of each rotaryplate.
 6. The exhaust structure according to claim 1, wherein, aconnecting opening is disposed on the rotary plate at a positioncorresponding to the sliding vane mounting portion; and the rotary plateis fixed on the sliding vane mounting portion through a connectingmember which is inserted and mounted in the connecting opening.
 7. Theexhaust structure according to claim 5, wherein, a sum ofcross-sectional areas of all exhaust passages is greater than a sum ofcross-sectional areas of all exhaust openings.
 8. The exhaust structureaccording to claim 2, wherein, the vent is a chamfered structure, whichis disposed at an edge of the sliding vane mounting portion and adjacentto the exhaust side of each sliding vane.
 9. The exhaust structureaccording to claim 8, wherein, a chamfered surface of the chamferedstructure is a curved surface.
 10. A compressor, comprising an exhauststructure, wherein, the exhaust structure is as defined in claim
 1. 11.The exhaust structure according to claim 2, wherein, there is only onerotary plate, which is provided between the upper flange and the slidingvane mounting portion; and exhaust passages are disposed in the upperflange and corresponding to respective exhaust openings of the rotaryplate.
 12. The exhaust structure according to claim 2, wherein, there isonly one rotary plate, which is provided between the lower flange andthe sliding vane mounting portion; and exhaust passages are disposed inthe lower flange and corresponding to respective exhaust openings of therotary plate.
 13. The exhaust structure according to claim 2, wherein,there are two rotary plates; one rotary plate is provided between theupper flange and the sliding vane mounting portion; another rotary plateis provided between the lower flange and the sliding vane mountingportion; and the upper flange and the lower flange are both providedwith exhaust passages corresponding to respective exhaust openings ofeach rotary plate.
 14. The compressor according to claim 10, wherein,the sliding vane mounting portion is provided with a vent, which isconfigured to increase an area of communication between the exhaust sideof the sliding vane and the exhaust opening of the rotary plate.
 15. Thecompressor according to claim 10, wherein, there is only one rotaryplate, which is provided between the upper flange and the sliding vanemounting portion; and exhaust passages are disposed in the upper flangeand corresponding to respective exhaust openings of the rotary plate.16. The compressor according to claim 10, wherein, there is only onerotary plate, which is provided between the lower flange and the slidingvane mounting portion; and exhaust passages are disposed in the lowerflange and corresponding to respective exhaust openings of the rotaryplate.
 17. The compressor according to claim 10, wherein, there are tworotary plates; one rotary plate is provided between the upper flange andthe sliding vane mounting portion; another rotary plate is providedbetween the lower flange and the sliding vane mounting portion; and theupper flange and the lower flange are both provided with exhaustpassages corresponding to respective exhaust openings of each rotaryplate.
 18. The compressor according to claim 10, wherein, a connectingopening is disposed on the rotary plate at a position corresponding tothe sliding vane mounting portion; and the rotary plate is fixed on thesliding vane mounting portion through a connecting member which isinserted and mounted in the connecting opening.
 19. The compressoraccording to claim 17, wherein, a sum of cross-sectional areas of allexhaust passages is greater than a sum of cross-sectional areas of allexhaust openings.
 20. The compressor according to claim 14, wherein, thevent is a chamfered structure, which is disposed at an edge of thesliding vane mounting portion and adjacent to the exhaust side of eachsliding vane.